Drawing-press.



Patented Mar. 2, 1915.

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inscseen Specification of Letters Patent.

Psten'tecl Man 2 1 915 5 Application filed September 2, 1814. Serial No. 859,789.

Brooklyn, county of Kings, State of New 5 York, have invented certain new and useful Improvements in DraWing-Presses of which the following is a specification.

My invention relates to drawing presses and has for its object to provide means whereby a double-action press may quickly and simply be converted; into a single-action press. By double-action presses, clvnoean a press wherein the Work is support-es upon a heel and is held in place by a reciprocating blanlnhclrler' While the operating member, frequently callecl a punch, is brought into operative position usually inside the hlankholder.

"t isirequently highly desirable in shops employing double-action presses, to have a single-action press which shall have the capscity for WDIlK of a larger size usually possessecl by a double action press. The large expense attendant upon the manufacture of presses of this character frequently prevents the shop from obtaining such additional press will consequently be 'perceivecl that economy would be obtained if means Were provided to simply and efiie ciently transform a double-action press into single-action press.

My invention has for its object to accomolish on! ose anal itconsists in devices L .a 1 a 1 a -i 1 ie olanlr-noloer ans ouncn ma;

cogetner Wnen it is ClESlfQCl that "the press shall set as a single-action press,

and further to provide means for disconnesting one of said presses 1 cm its operating devices so that the said which then acts as a single die call he s aler he sole control of the remaining coereting erice.

1 I 7 .51 7 T u 1 Q? J. 5i tiesiraole iorra in invension l toe ecconidisconislinai secnevice for en; encl My invention is ephliezilole to doubleaction presses generally, and isillustrated particularly in connection With's press of the type illustrated in my Patent NOQ '9555'173,

elated. April 19,. 1910, which is a doublecrank double-acting press.

in the pressillustratetl the blank-holder or the carrier, uponthe lower i ace ofwhich the blank-holder is mounted, :i s'iindicated at A. For convenience of reference the saicl part Will be hereinafter referred to as a blankuckier. Within this lolank-holderis situate& the pliinger Aipon' the lower face i which the upper clie or punch is incensed. To'facilitate the nndersta'nclingioi my invent-ion applied to thegoar'ticular machine illustrated, Willgive a brief riescription' thereof.

The' hecl C carries the lower fiie noon the face of which the materiel is clam-giecl and 'WQI'lK'Ell. The ask-holder is gcierl upon the sicle nee of the mac ine by guides D and the nlnnger E is Within the The plunger is driven from F nich he a c l. justerl in length as elesirecl in any suite. is manner, as shown in my se cl patent. The linlrs con Noted i l upper encls to cranks H 7 upon the p Lager l m hearings the ernieniate a n SL155 1TB. 1653.

AL A w U W across we reel oi efl; mael hie :Jaralle a he fang its r1 the driven connections are substantially the same for these two rock-shafts. The rockshaft 0 is driven by means of arms 7 f at its opposite ends and close to the said frames of the machine, these arms being connected by links 9 g to slides h k which reciprocate vertically. As the slides h 72. approach their upper ends, the links 9 g approach a horizontal position. 'When the links 9 g are approximately horizontal and the arms f f and cranks e e are approximately vertical, the blank-holder is pressed to its final position. The slides h k are driven from the plunger-actuating shaft or gears, and are located at opposite ends of the shaft. These slides are guided at their upper and lower ends by guidew-ays j embraced by flanges Z m respectively at the upper and lower ends of the slides, and formed on the upper projecting rib Y, and a similar lower projecting rib'n. The slides h M are'locateol between the gears M' M and the corresponding side frames and are driven therefrom by means of links 0 connested at their upper ends to crank pins 9 upon the outer faces of the gears, and at their lower ends to pins g upon bosses r constituting extensions of the lower portionsoftheslides. Various details of construction of the said pressare not described herein. as they are not necessary to an understanding of my inventionthey will be found inmy aforesaid patent.

According tomy present invention, means are provided whereby my double-crank double-acting press is converted into a double-crank, single-acting press. For this purpose it is necessary that the blank-holder and plunger which carries the punch should as a unit and form a single tool for any desired operation to be performed upon the machine. I accomplish this by providing means for locking the said parts together. Such means maybe any convenient way of accomplishing this purpose, the most desirable form now knownto me being the employrnent of a tongue G which is illustrated as carried upon the blank-holder and extending horizontally in line therewith. It is-adjustable in position and may be inoved forward to engage and lock the plunger. For this purpose the plunger is illustrated as being provided with a groove G of a size tosnugly receive the tongue G. Means are provided to adjust the tongue to and from locking position, andlsuch means, as illustrated, comprise a series of screws g 9 The screws 9 pass freely through threaded openings in bosses g projecting upwardly the tongue and are threaded into a part g of the blank-holder, which is relatively fixed. The tongue may be drawn arlto locking position turning screws g, ofwhich three are illustrated. so

z; the head of the said seew will draw the tongue forward into the groove in the plunger. The bolt 9 may have the head fixed on it if desired, or the same may take the form of a nut 9 by the turning of which on the threaded bolt 9 the tongue may be drawn to locking position. For with drawing the tongue from looking position the screws g are provided. These are threaded into bosses g and abut against the relatively fixed part 9 of the blank-holder, thereby as the said screws are turned forward in their supports they withdraw the tongue from looking position. Bolts 9 are unscrewedas the tongue is forced to locking position. so

In order that the blank-holder and plunger'may operate as a'single tool it isnecessary that one or the other of them should have its operating devices disconnected as these, do not cause the said parts to operate as coincidentally. I prefer to disconnect the blank-holder from its operating devices-and accordingly If have shown means for accomplishing this purpose. In view of'the fact that the press with which my invention is so illustrated is a double crank press, it is necessary that both sets of operating .devices should be disconnected simultaneously, and this-Janey well be'accomplishedby withdrawing the pivots a a upon which the 55 links a c are mounted. To'accomplish this i have provided aturn-buckle X, which comprises an internally threaded sleeve m, which receives the threaded ends of the pivots a a and being turned by the handle & a withdraws the said: pivots from the-links and permits the same to drop out, as illustrated in Fig. 3, where K have provided shoulders a to support them. There being two pairs of links, the turn-buckle and removable pivots will be provided for each pair so that all of the operating devices for operating the blank-holder may be disconnected when desired. l he conversion of the double-acting press to a single-acting press does not afiect the balance of the parts in view of the fact that the heavy slides 72. b will still be connected to the gears M M and will balance the weight of the associated plunger and blank-holder, as heretofore.

The double-acting press herein illustrated, when converted by means of my in vention as herein described to a single-acting press will be found-as efficient and'useful for this purpose as though it had been constructed asa singleacting press, and by this means 1' am enabled to provide two presses for substantially the price of one. v

Although have descibed with great particularity the construction of press to which my invention is applied, it is under stood that its utility is not limited to the type of press employed, as it might equally well be employed other double-acting: 1%

presses; nor i my invention limited to the particular manner Which FL have illustrated of accomplishing the purpose desired. Although these the best Ways novv known to me of carrying my invention into efiect, it will be apparent that other methods of accomplishing this object may be devised, and my invention is broad enough to cover such other constructions Within the limits of the appended claims.

ld hat I claim is a 1. in a doubleacting press having a blank-holder and a plunger, means for converting the same into a single-acting press, comprising a lock for locking together the blank-holder and plunger, and means for disconnecting one of said parts from its operating mechanism.

2. In a doubleacting press having a blank-holder and a plunger, means for coni verting the same into a single a'cting press, comprising a lock for locking together the blank-holder and plunger, and means fordisconnecting the blank-holder from its operating mechanism.

3.111 a double acting press having a blank-holder and a plunger, means for converting the same into a single-acting press, comprising a lock in the blank-holder for locking it to the plunger, and means for disconnecting one of said parts from its operating mechanism.

l. In a double-acting press having a blank-holder and a plunger, means for converting the same into a single-acting press, comprising a lock in the blank-holder for locking it to the plunger, and means for disconnecting the blank-holder from its operating mechanism.

5. In a double-acting press having a blank-holder and a plunger, means for conierting the same into a single-acting press, comprising an adjustable tongue on the blank-holder adapted to enter a corresponding groove in the plunger and lock the on -older and plunger together,

adjusting the tongue ijo and out position, and means tor disconof said parts from its 01 erating out of locki-g position, and means for dis connectin one or" said parts from its opera ating mechanisms,

7.111 a double-acting press having blank-holder and a plunger and operating devices therefor including a pivoted link, an adjustable lock for locking together the blank-holder and plunger, and means for disconnecting one at said parts from its operating devices comprising a removable pivot for said link.

8. In a double-acting press having a blank-holder and a plunger and operating devices therefor, said devices including a pivoted link as part of the devices for operating said blank-holder, an adjustable lock for locking together the blank-holder and plunger, and means for disconnecting said operating devices comprising a removable pivot for said link.

9. in a double-acting press having a blank-holder and a plunger and operating devices therefor, said devices including a pair of alined pivoted links as part of the devices for operating said blank-holder, an adjustable lock for locking together the blank-holder and plunger, and means for disconnecting said operating devices comprising removable pivots for said links and a turn-buckle connected to said pivots for withdrawing or replacing the same simultaneously.

10. In a double-acting press having a blank holder and a plunger and means for converting the same into aisingle-acting press, comprising locking devices for causing the blank holder and plunger to operate in unison, an operating shaft for one of the parts, operating connections between said shaft and said part, and means for disconnecting said operating connections whereby the said blank holder and plunger are caused. to operate as a single part Without disturbing the balance of the machine.

11. in a double-acting press having a blank holder and a plunger, means for converting the same into a single-acting press compi sing locking devices for causing said .i blank holder and plunger to operate in unidevices including an addirts. 

